multiple rows are not stored in database - php

Question

I am using jQuery and Ajax in php. I want to submit multiple rows at a time. but my code is not working properly due to the 'plantation_journal_no' which is a primary key of plantation_journal_details and the foreign key of past_history_species_details . I am badly stuck here. Can anyone please advice me that how can I solve this problem?? Thanks in advance guys. codes are given below :
index.php
<div class="row">
<form method="post" id="insert_form2" style="padding-right: 10px;">
<div class="table-repsonsive">
<span id="error"></span>
<table class="table table-bordered" id="item_table2">
<tr>
<th>Species</th>
<th>Product</th>
<th>Quantity</th>
<th>Value (Rs.)</th>
<th><button type="button" name="add2" class="btn btn-success btn-sm add2"><span class="glyphicon glyphicon-plus"></span></button></th>
</tr>
</table>
</div>
<br>
<div align="right">
<input type="submit" name="submit4" class="btn btn-info" value="Add" onclick="move4()">
</div>
</form>
</div>
<script>
$(document).ready(function(){
$(document).on('click', '.add2', function(){
var html = '';
html += '<tr>';
html += '<td><input type="text" name="species[]" class="form-control species" /></td>';
html += '<td><select name="product[]" class="form-control product"><option value="">---Select---</option><option value="reserved">Reserved</option><option value="protected">Protected</option><option value="Unclassed">Unclassed</option></select></td>';
html += '<td><input type="text" name="quantity[]" class="form-control quantity" /></td>';
html += '<td><input type="text" name="value[]" class="form-control value" /></td>';
html += '<td><button type="button" name="remove2" class="btn btn-danger btn-sm remove2"><span class="glyphicon glyphicon-minus"></span></button></td></tr>';
$('#item_table2').append(html);
});
$(document).on('click', '.remove2', function(){
$(this).closest('tr').remove();
});
$('#insert_form2').on('submit', function(event){
event.preventDefault();
var error = '';
$('.species').each(function(){
var count = 1;
if($(this).val() == '')
{
error += "<p>Enter Item Name at "+count+" Row</p>";
return false;
}
count = count + 1;
});
$('.product').each(function(){
var count = 1;
if($(this).val() == '')
{
error += "<p>Enter Item Quantity at "+count+" Row</p>";
return false;
}
count = count + 1;
});
$('.quantity').each(function(){
var count = 1;
if($(this).val() == '')
{
error += "<p>Select Unit at "+count+" Row</p>";
return false;
}
count = count + 1;
});
$('.value').each(function(){
var count = 1;
if($(this).val() == '')
{
error += "<p>Select Unit at "+count+" Row</p>";
return false;
}
count = count + 1;
});
var form_data = $(this).serialize();
if(error == '')
{
$.ajax({
url:"insert2.php",
method:"POST",
data:form_data,
success:function(data)
{
if(data == 'ok')
{
$('#item_table2').find("tr:gt(0)").remove();
}
}
});
}
});
});
</script>
insert2.php
<?php
//insert.php;
if(isset($_POST["species"]))
{
$connect = new PDO("mysql:host=localhost;dbname=forestdb", "root", "");
$id=uniqid();
$sql="SELECT plantation_journal_no from plantation_journal_basic_details
where plantation_journal_no=(select max(plantation_journal_no) from
plantation_journal_basic_details);";
$state=$connect->prepare($sql);
$state->execute();
$row=$state->fetch();
$plantation_journal_no = $row['plantation_journal_no'];
for($count = 0; $count < count($_POST["species"]); $count++)
{
$query = "INSERT INTO past_history_species_details
(id, plantation_journal_no, species, product, quantity, value)
VALUES (:id, :plantation_journal_no, :species, :product, :quantity,
:value) ";
$statement = $connect->prepare($query);
$statement->execute(
array(
':id' => $id,
':plantation_journal_no' => $plantation_journal_no,
':species' => $_POST["species"][$count],
':product' => $_POST["product"][$count],
':quantity' => $_POST["quantity"][$count],
':value' => $_POST["value"][$count]
)
);
}
$result = $statement->fetchAll();
if(isset($result))
{
echo 'ok';
}
}
?>
Frontend Table:
Backend Table

Answer 1

I'm guessing id is the primary key of the past_history_species_details table. You're using the same uniqid() for every row you try to insert. You need to get a new ID each time through the loop.
for($count = 0; $count < count($_POST["species"]); $count++)
{
$id = uniqid();
$query = "INSERT INTO past_history_species_details
(id, plantation_journal_no, species, product, quantity, value)
VALUES (:id, :plantation_journal_no, :species, :product, :quantity,
:value) ";
$statement = $connect->prepare($query);
$statement->execute(
array(
':id' => $id,
':plantation_journal_no' => $plantation_journal_no,
':species' => $_POST["species"][$count],
':product' => $_POST["product"][$count],
':quantity' => $_POST["quantity"][$count],
':value' => $_POST["value"][$count]
)
);
}
Things would be easier if you made this an auto-increment column.